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Mechanical Engineering · all questions

Refrigeration And Air Conditioning
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Most of the domestic refrigerators work on the following refrigeration system

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In a lithium bromide absorption refrigeration system

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The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

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The alignment circle is marked on the psychrometric chart at

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The evolution of heat of solution takes place in ammonia absorption plant when

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When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding will be

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The capacity of a domestic refrigerator is in the range of

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Mass flow ratio of NH3 in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

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Allowable pressure on high pressure side or ammonia absorption system is of the order of

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Rating of a domestic refrigerator is of the order of

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Condensing temperature in a refrigerator is the temperature

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In aircraft, air refrigeration Cycle is used because of

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In vapour compression cycle, the condition of refrigerant is very wet vapour

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Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

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During sensible cooling,

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During sensible cooling of air, specific humidity

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The lowest temperature during the cycle in a vapour compression system occurs after

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The COP of a domestic refrigerator

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Accumulators should have adequate volume to store refrigerant charge at least

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Which of the following refrigerant has the highest freezing point.

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